This species is rather controversial because some old references contradict each other, which is also the reason why the observations between 1980 and 2004 are called into question.
De Sélys-Longchamps E. 1837.
Catalogue des Lépidoptères ou Papillons de la Belgique, précédé du tableau des Libellulines de ce pays. — —
:
1–29. On page 28 (as Lithosia Unita).
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